module rewrite error

I have uploaded a file with a post (uploaded ok and is on server in that folder) but when I try to retreive it i see a “5000 URL Rewrite Module Error” in firebug.

the file is:
https://doc.onesportevent.com/wp-content/uploads/2010/03/onesporteventdrupal1141.zip

I tried a couple of different web.config rewrites, including the default one. My understanding is if the file exists on the server it should just serve it without redirecting to index.php; but can’t figure out whats wrong here. I have a test site if anyone is inclined to look at the admin console PM me, but this shouldn’t be to hard right?!

here is one config i tried:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <rewrite>
      <rules>
        <rule name="wordpress" stopProcessing="true">
          <match url=".*"/>
          <conditions logicalGrouping="MatchAll">
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true"/>
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true"/>
          </conditions>
          <action type="Rewrite" url="index.php"/>
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>

and the other:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <rewrite>
      <rules>
        <rule name="wordpress" patternSyntax="Wildcard">
          <match url="*"/>
          <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true"/>
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true"/>
          </conditions>
          <action type="Rewrite" url="index.php"/>
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>

regards
ewart.